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Porcupine Caribou herd crossing Turner River Arctic National Wildlife Refuge Arctic AK Summer
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Multiple exposure of arctic midnight sun moving across horizon over Arctic Coast ANWR w/silhouette antlers
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An Aerial View Of The Green Waters Of The Braided Upper Sheenjek River Which Flows South From Alaska's Brooks Range In The Arctic National Wildlife Refuge;Alaska United States Of America
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Two Piper Super Cubs are parked next to a tent along the Kongakut River under the midnight sun, ANWR, Arctic Alaska, Summer
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An Aerial View Of The Green Waters Of The Braided Upper Sheenjek River Which Flows South From Alaska's Brooks Range In The Arctic National Wildlife Refuge;Alaska United States Of America
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Hardy arctic wildflowers grow only a few inches high in order to reduce exposure to the moisture-robbing winds, Arctic National Wildlife Refuge.
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View of the Porcupine Caribou herd crossing the Hulahula River near Old Man Creek during their annual migration through ANWR, Arctic Alaska, Summer
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Aufeis refers to ice that builds up in layers over arctic rivers. Windblown sediments collect on top of the aufeis frozen surface.
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Two sub adult polar bears swim in slush ice along a barrier island outside Kaktovik, Alaska. Every fall, polar bears (Ursus maritimus) gather near Kaktovik on the northern edge of ANWR, Arctic Alaska, Fall
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View of the Porcupine Caribou herd climbing a steep bank after swimming across the Hulahula River during their annual migration in ANWR, Arctic Alaska, Summer
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A sub adult Polar Bear rubs it's head along the icy shoreline of a barrier island outside Kaktovik on the northern edge of ANWR, Arcitc Alaska, Fall
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Polar Bear swimming in Beaufort Sea off coast of Arctic National Wildlife Refuge Arctic Alaska Summer
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Close up of a backcountry skier on the glacier on the north side of Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Backpacker sits inside a tent and waits out inclement weather at an alpine camp below Mt. Chamberln, Brooks Range, ANWR, Arctic Alaska, Summer
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Aerial of the rugged Philip Smith Mountains portion of the Brooks Range in ANWR, Arctic Alaska, Summer, HDR
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Aerial view of a Piper Super Cub airplane flying over the Jago River and tundra of the coastal plain in ANWR with the Romanzof Mountains in the background, Arctic Alaska, Summer
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Aerial view of a Piper Super Cub airplane flying over the Jago River and tundra of the coastal plain in ANWR with the Romanzof Mountains in the background, Arctic Alaska, Summer
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Backpacker prepares food base camp along the Hulahula River, Brooks Range, ANWR, Arctic Alaska, Summer
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Backpacker climbs the West Ridge of Mt. Chamberlin in the Brooks Range, ANWR, Arctic Alaska, Summer
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Woman photographs the Hulahula River near its source in the Brooks Range in ANWR, Arctic Alaska, Summer
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Aerial view of the Okpilak River in the coastal plain of the Arctic National Wildlife Refuge, Arctic Alaska, Summer
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Backpacker approaches the summit of Mt. Chamberlin in the Brooks Range, ANWR, Arctic Alaska, Summer
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Backpacker looks over the scene below as he climbs the West Ridge of Mt. Chamberlin in the Brooks Range, ANWR, Arctic Alaska, Summer
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Backcountry skier hikes up the Katak Creek valley with pack and skis, Brooks Range, ANWR, Arctic Alaska, Summer
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Aerial view of a Piper Super Cub airplane flying over a herd of caribou on a ridgeline in the Romanzof Mountains, Brooks Range, Arctic National Wildlife Refuge, Arctic Alaska, Summer
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View of the Porcupine Caribou herd heading up the bank from a gravel bar by Hulahula River in ANWR, Arctic Alaska, Summer
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Backcountry skier makes an early morning ascent of the north side of Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Man makes final adjustments to an electric bear fence at camp along the Hulahula River, Brooks Range, ANWR, Arctic Alaska, Summer
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Backcountry skier makes an early morning ascent of the north side of Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Backcountry skier hikes with pack and skis up the Katak Creek valley, Brooks Range, ANWR, Arctic Alaska, Summer
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A double rainbow forms on a summer evening over the Hulahula River at Grasser's Strip in Alaska's Arctic National Wildlife Refuge, Arctic Alaska, Summer
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Aerial view of a small lake in the coastal plain of the Arctic National Wildlife Refuge, Arctic Alaska, Summer
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Backpacker climbs the West Ridge of Mt. Chamberlin in the Brooks Range, ANWR, Arctic Alaska, Summer
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Backpacker prepares food at camp below Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Backcountry skier makes an early morning ascent of the north side of Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Backpacker fills pan with water from a creek at an alpine camp below Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Backpacker sits inside a tent and waits out inclement weather at an alpine camp below Mt. Chamberln, Brooks Range, ANWR, Arctic Alaska, Summer
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Two polar bear cubs play in slush ice along a barrier island outside Kaktovik on the northern edge of ANWR, Arctic Alaska, Fall
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Backpacker reads a book inside a tent and waits out inclement weather at an alpine camp below Mt. Chamberln, Brooks Range, ANWR, Arctic Alaska, Summer
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A meadow of Wild Sweet Pea (Hedysarum mackenzii) beside the Kongakut river
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Backpacker eats snacks at base camp along the Hulahula River, Brooks Range, ANWR, Arctic Alaska, Summer
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Scenic view overlooking Katak Creek with wildflowers in the foreground, Brooks Range, ANWR, Arctic Alaska, Summer
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Backpacker next to a creek in the Katak Creek valley hiking to Mt. Chamberlin ski descent, Brooks Range, ANWR, Arctic Alaska, Summer
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Aerial view of a Piper Super Cub airplane flying over the Jago River and tundra of the coastal plain in ANWR with the Romanzof Mountains in the background, Arctic Alaska, Summer
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Backcountry skier hikes with pack and skis above the Hulahula River, Brooks Range, ANWR, Arctic Alaska, Summer
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Woman photographing the tundra and scenery along the Kongakut River, ANWR, Arctic Alaska, Summer
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Backpacker climbs the West Ridge of Mt. Chamberlin in the Brooks Range, ANWR, Arctic Alaska, Summer
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Backpacker climbs the West Ridge of Mt. Chamberlin in the Brooks Range, ANWR, Arctic Alaska, Summer
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Hardy arctic wildflowers grow only a few inches high in order to reduce exposure to the moisture-robbing winds, Arctic National Wildlife Refuge, Alaska, USA.
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Skier measures the surface elevation of the Katak Glacier with a survey grade GPS for a climate change/global warming study on Mount Chamberlin, Brooks Range, Arctic National Wildlife Refuge, Summer in Actic Alaska
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Backcountry skier makes an early morning ascent of the north side of Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Aerial of single caribou running across ice on Ivishak River, ANWR, Arctic Alaska, Summer.
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Backcountry skier makes an early morning descent of the north side of Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Scenic view overlooking the upper Kongakut River and valley with aufeis sheets of ice frozen in the middle of Summer, ANWR, Arctic Alaska
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Vast herds of caribou (Rangifer tarandus) feed on the tundra and muskeg of the North Slope
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Skier ascends the north ridge of Mount Chamberlin in the Brooks Range, Arctic National Wildlife Refuge, Summer in Arctic Alaska
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Hiker relaxes at basecamp in the Hulahula River Valley on the northern edge of ANWR, Brooks Range, Arctic Alaska, Summer
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Backcountry hiker camps in the Katak Creek valley, Brooks Range, ANWR, Arctic Alaska, Summer
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Woman photographing the tundra and scenery along the Kongakut River, ANWR, Arctic Alaska, Summer
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Two rafters rowing through a fast stretch of the Kongakut River on a sunny day with scenic mountains in the background, ANWR, Arctic Alaska, Summer
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Backpacker hiking through tundra tussock above the Hulahula River, Arctic National Wildlife Refuge, Brooks Range, summer in Arctic Alaska
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A polar bear cub swims in slush ice along a barrier island outside Kaktovik on the northern edge of ANWR, Arctic Alaska, Fall
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Aerial view of the Tamayariak River and the Sadlerochit Mountains along the coastal plain in the Arctic National Wildlife Refuge, Arctic Alaska, Summer
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Aerial view of the Okpilak River in the coastal plain of the Arctic National Wildlife Refuge, Arctic Alaska, Summer
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Female polar bear and cubs stranded by summer ice melt near Kaktovik, Alaska
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Female polar bear defending yearling cub on barrier island near Kaktovik, Alaska
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Two rafters rowing through a fast stretch of the Kongakut River on a sunny day with scenic mountains in the background, ANWR, Arctic Alaska, Summer
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Backcountry skier hikes with pack and skis up the Katak Creek valley, Brooks Range, ANWR, Arctic Alaska, Summer
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Backcountry skier prepares skis for descent of the north side of Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Two rafters view sheets of aufeis ice along the Kongakut River while floating downriver, ANWR, Arctic Alaska, Summer
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Large male polar bears stranded by summer ice melt near Kaktovik, Alaska
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Large male polar bears stranded by summer ice melt near Kaktovik, Alaska
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USA,Alaska,Arctic National Wildlife Refuge. Vast herds of caribou (Rangifer tarandus) feed on the tundra and muskeg of the North Slope
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Backpacker crosses a creek in the Katak Creek valley returning from Mt. Chamberlin ski descent, Brooks Range, ANWR, Arctic Alaska, Summer
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Caribou cows & calf crossing Turner River Arctic National Wildlife Refuge Arctic AK Summer
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Backcountry skier on the glacier on the north side of Mt. Chamberlin, Brooks Range, ANWR, Arctic Alaska, Summer
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Hiker on the tundra walks by a wolf skull along Katak Creek, Brooks Range, ANWR, Arctic Alaska, Summer
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View of the Hulahula River near its source in the Brooks Range, ANWR, Arctic Alaska, Summer
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Aerial of the village of Kaktovik in Arctic National Wildlife Refuge Beaufort Sea Arctic Alaska Autumn
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